( function () {
class ColladaLoader extends THREE.Loader {
  constructor(manager) {
    super(manager);
  }

  load(url, onLoad, onProgress, onError) {
    const scope = this;
    const path = scope.path === '' ? THREE.LoaderUtils.extractUrlBase(url) : scope.path;
    const loader = new THREE.FileLoader(scope.manager);
    loader.setPath(scope.path);
    loader.setRequestHeader(scope.requestHeader);
    loader.setWithCredentials(scope.withCredentials);
    loader.load(url, function (text) {
      try {
        onLoad(scope.parse(text, path));
      } catch (e) {
        if (onError) {
          onError(e);
        } else {
          console.error(e);
        }

        scope.manager.itemError(url);
      }
    }, onProgress, onError);
  }

  parse(text, path) {
    function getElementsByTagName(xml, name) {
      // Non recursive xml.getElementsByTagName() ...
      const array = [];
      const childNodes = xml.childNodes;

      for (let i = 0, l = childNodes.length; i < l; i++) {
        const child = childNodes[i];

        if (child.nodeName === name) {
          array.push(child);
        }
      }

      return array;
    }

    function parseStrings(text) {
      if (text.length === 0) return [];
      const parts = text.trim().split(/\s+/);
      const array = new Array(parts.length);

      for (let i = 0, l = parts.length; i < l; i++) {
        array[i] = parts[i];
      }

      return array;
    }

    function parseFloats(text) {
      if (text.length === 0) return [];
      const parts = text.trim().split(/\s+/);
      const array = new Array(parts.length);

      for (let i = 0, l = parts.length; i < l; i++) {
        array[i] = parseFloat(parts[i]);
      }

      return array;
    }

    function parseInts(text) {
      if (text.length === 0) return [];
      const parts = text.trim().split(/\s+/);
      const array = new Array(parts.length);

      for (let i = 0, l = parts.length; i < l; i++) {
        array[i] = parseInt(parts[i]);
      }

      return array;
    }

    function parseId(text) {
      return text.substring(1);
    }

    function generateId() {
      return 'three_default_' + count++;
    }

    function isEmpty(object) {
      return Object.keys(object).length === 0;
    } // asset


    function parseAsset(xml) {
      return {
        unit: parseAssetUnit(getElementsByTagName(xml, 'unit')[0]),
        upAxis: parseAssetUpAxis(getElementsByTagName(xml, 'up_axis')[0])
      };
    }

    function parseAssetUnit(xml) {
      if (xml !== undefined && xml.hasAttribute('meter') === true) {
        return parseFloat(xml.getAttribute('meter'));
      } else {
        return 1; // default 1 meter
      }
    }

    function parseAssetUpAxis(xml) {
      return xml !== undefined ? xml.textContent : 'Y_UP';
    } // library


    function parseLibrary(xml, libraryName, nodeName, parser) {
      const library = getElementsByTagName(xml, libraryName)[0];

      if (library !== undefined) {
        const elements = getElementsByTagName(library, nodeName);

        for (let i = 0; i < elements.length; i++) {
          parser(elements[i]);
        }
      }
    }

    function buildLibrary(data, builder) {
      for (const name in data) {
        const object = data[name];
        object.build = builder(data[name]);
      }
    } // get


    function getBuild(data, builder) {
      if (data.build !== undefined) return data.build;
      data.build = builder(data);
      return data.build;
    } // animation


    function parseAnimation(xml) {
      const data = {
        sources: {},
        samplers: {},
        channels: {}
      };
      let hasChildren = false;

      for (let i = 0, l = xml.childNodes.length; i < l; i++) {
        const child = xml.childNodes[i];
        if (child.nodeType !== 1) continue;
        let id;

        switch (child.nodeName) {
          case 'source':
            id = child.getAttribute('id');
            data.sources[id] = parseSource(child);
            break;

          case 'sampler':
            id = child.getAttribute('id');
            data.samplers[id] = parseAnimationSampler(child);
            break;

          case 'channel':
            id = child.getAttribute('target');
            data.channels[id] = parseAnimationChannel(child);
            break;

          case 'animation':
            // hierarchy of related animations
            parseAnimation(child);
            hasChildren = true;
            break;

          default:
            console.log(child);
        }
      }

      if (hasChildren === false) {
        // since 'id' attributes can be optional, it's necessary to generate a UUID for unqiue assignment
        library.animations[xml.getAttribute('id') || THREE.MathUtils.generateUUID()] = data;
      }
    }

    function parseAnimationSampler(xml) {
      const data = {
        inputs: {}
      };

      for (let i = 0, l = xml.childNodes.length; i < l; i++) {
        const child = xml.childNodes[i];
        if (child.nodeType !== 1) continue;

        switch (child.nodeName) {
          case 'input':
            const id = parseId(child.getAttribute('source'));
            const semantic = child.getAttribute('semantic');
            data.inputs[semantic] = id;
            break;
        }
      }

      return data;
    }

    function parseAnimationChannel(xml) {
      const data = {};
      const target = xml.getAttribute('target'); // parsing SID Addressing Syntax

      let parts = target.split('/');
      const id = parts.shift();
      let sid = parts.shift(); // check selection syntax

      const arraySyntax = sid.indexOf('(') !== -1;
      const memberSyntax = sid.indexOf('.') !== -1;

      if (memberSyntax) {
        //  member selection access
        parts = sid.split('.');
        sid = parts.shift();
        data.member = parts.shift();
      } else if (arraySyntax) {
        // array-access syntax. can be used to express fields in one-dimensional vectors or two-dimensional matrices.
        const indices = sid.split('(');
        sid = indices.shift();

        for (let i = 0; i < indices.length; i++) {
          indices[i] = parseInt(indices[i].replace(/\)/, ''));
        }

        data.indices = indices;
      }

      data.id = id;
      data.sid = sid;
      data.arraySyntax = arraySyntax;
      data.memberSyntax = memberSyntax;
      data.sampler = parseId(xml.getAttribute('source'));
      return data;
    }

    function buildAnimation(data) {
      const tracks = [];
      const channels = data.channels;
      const samplers = data.samplers;
      const sources = data.sources;

      for (const target in channels) {
        if (channels.hasOwnProperty(target)) {
          const channel = channels[target];
          const sampler = samplers[channel.sampler];
          const inputId = sampler.inputs.INPUT;
          const outputId = sampler.inputs.OUTPUT;
          const inputSource = sources[inputId];
          const outputSource = sources[outputId];
          const animation = buildAnimationChannel(channel, inputSource, outputSource);
          createKeyframeTracks(animation, tracks);
        }
      }

      return tracks;
    }

    function getAnimation(id) {
      return getBuild(library.animations[id], buildAnimation);
    }

    function buildAnimationChannel(channel, inputSource, outputSource) {
      const node = library.nodes[channel.id];
      const object3D = getNode(node.id);
      const transform = node.transforms[channel.sid];
      const defaultMatrix = node.matrix.clone().transpose();
      let time, stride;
      let i, il, j, jl;
      const data = {}; // the collada spec allows the animation of data in various ways.
      // depending on the transform type (matrix, translate, rotate, scale), we execute different logic

      switch (transform) {
        case 'matrix':
          for (i = 0, il = inputSource.array.length; i < il; i++) {
            time = inputSource.array[i];
            stride = i * outputSource.stride;
            if (data[time] === undefined) data[time] = {};

            if (channel.arraySyntax === true) {
              const value = outputSource.array[stride];
              const index = channel.indices[0] + 4 * channel.indices[1];
              data[time][index] = value;
            } else {
              for (j = 0, jl = outputSource.stride; j < jl; j++) {
                data[time][j] = outputSource.array[stride + j];
              }
            }
          }

          break;

        case 'translate':
          console.warn('THREE.ColladaLoader: Animation transform type "%s" not yet implemented.', transform);
          break;

        case 'rotate':
          console.warn('THREE.ColladaLoader: Animation transform type "%s" not yet implemented.', transform);
          break;

        case 'scale':
          console.warn('THREE.ColladaLoader: Animation transform type "%s" not yet implemented.', transform);
          break;
      }

      const keyframes = prepareAnimationData(data, defaultMatrix);
      const animation = {
        name: object3D.uuid,
        keyframes: keyframes
      };
      return animation;
    }

    function prepareAnimationData(data, defaultMatrix) {
      const keyframes = []; // transfer data into a sortable array

      for (const time in data) {
        keyframes.push({
          time: parseFloat(time),
          value: data[time]
        });
      } // ensure keyframes are sorted by time


      keyframes.sort(ascending); // now we clean up all animation data, so we can use them for keyframe tracks

      for (let i = 0; i < 16; i++) {
        transformAnimationData(keyframes, i, defaultMatrix.elements[i]);
      }

      return keyframes; // array sort function

      function ascending(a, b) {
        return a.time - b.time;
      }
    }

    const position = new THREE.Vector3();
    const scale = new THREE.Vector3();
    const quaternion = new THREE.Quaternion();

    function createKeyframeTracks(animation, tracks) {
      const keyframes = animation.keyframes;
      const name = animation.name;
      const times = [];
      const positionData = [];
      const quaternionData = [];
      const scaleData = [];

      for (let i = 0, l = keyframes.length; i < l; i++) {
        const keyframe = keyframes[i];
        const time = keyframe.time;
        const value = keyframe.value;
        matrix.fromArray(value).transpose();
        matrix.decompose(position, quaternion, scale);
        times.push(time);
        positionData.push(position.x, position.y, position.z);
        quaternionData.push(quaternion.x, quaternion.y, quaternion.z, quaternion.w);
        scaleData.push(scale.x, scale.y, scale.z);
      }

      if (positionData.length > 0) tracks.push(new THREE.VectorKeyframeTrack(name + '.position', times, positionData));
      if (quaternionData.length > 0) tracks.push(new THREE.QuaternionKeyframeTrack(name + '.quaternion', times, quaternionData));
      if (scaleData.length > 0) tracks.push(new THREE.VectorKeyframeTrack(name + '.scale', times, scaleData));
      return tracks;
    }

    function transformAnimationData(keyframes, property, defaultValue) {
      let keyframe;
      let empty = true;
      let i, l; // check, if values of a property are missing in our keyframes

      for (i = 0, l = keyframes.length; i < l; i++) {
        keyframe = keyframes[i];

        if (keyframe.value[property] === undefined) {
          keyframe.value[property] = null; // mark as missing
        } else {
          empty = false;
        }
      }

      if (empty === true) {
        // no values at all, so we set a default value
        for (i = 0, l = keyframes.length; i < l; i++) {
          keyframe = keyframes[i];
          keyframe.value[property] = defaultValue;
        }
      } else {
        // filling gaps
        createMissingKeyframes(keyframes, property);
      }
    }

    function createMissingKeyframes(keyframes, property) {
      let prev, next;

      for (let i = 0, l = keyframes.length; i < l; i++) {
        const keyframe = keyframes[i];

        if (keyframe.value[property] === null) {
          prev = getPrev(keyframes, i, property);
          next = getNext(keyframes, i, property);

          if (prev === null) {
            keyframe.value[property] = next.value[property];
            continue;
          }

          if (next === null) {
            keyframe.value[property] = prev.value[property];
            continue;
          }

          interpolate(keyframe, prev, next, property);
        }
      }
    }

    function getPrev(keyframes, i, property) {
      while (i >= 0) {
        const keyframe = keyframes[i];
        if (keyframe.value[property] !== null) return keyframe;
        i--;
      }

      return null;
    }

    function getNext(keyframes, i, property) {
      while (i < keyframes.length) {
        const keyframe = keyframes[i];
        if (keyframe.value[property] !== null) return keyframe;
        i++;
      }

      return null;
    }

    function interpolate(key, prev, next, property) {
      if (next.time - prev.time === 0) {
        key.value[property] = prev.value[property];
        return;
      }

      key.value[property] = (key.time - prev.time) * (next.value[property] - prev.value[property]) / (next.time - prev.time) + prev.value[property];
    } // animation clips


    function parseAnimationClip(xml) {
      const data = {
        name: xml.getAttribute('id') || 'default',
        start: parseFloat(xml.getAttribute('start') || 0),
        end: parseFloat(xml.getAttribute('end') || 0),
        animations: []
      };

      for (let i = 0, l = xml.childNodes.length; i < l; i++) {
        const child = xml.childNodes[i];
        if (child.nodeType !== 1) continue;

        switch (child.nodeName) {
          case 'instance_animation':
            data.animations.push(parseId(child.getAttribute('url')));
            break;
        }
      }

      library.clips[xml.getAttribute('id')] = data;
    }

    function buildAnimationClip(data) {
      const tracks = [];
      const name = data.name;
      const duration = data.end - data.start || -1;
      const animations = data.animations;

      for (let i = 0, il = animations.length; i < il; i++) {
        const animationTracks = getAnimation(animations[i]);

        for (let j = 0, jl = animationTracks.length; j < jl; j++) {
          tracks.push(animationTracks[j]);
        }
      }

      return new THREE.AnimationClip(name, duration, tracks);
    }

    function getAnimationClip(id) {
      return getBuild(library.clips[id], buildAnimationClip);
    } // controller


    function parseController(xml) {
      const data = {};

      for (let i = 0, l = xml.childNodes.length; i < l; i++) {
        const child = xml.childNodes[i];
        if (child.nodeType !== 1) continue;

        switch (child.nodeName) {
          case 'skin':
            // there is exactly one skin per controller
            data.id = parseId(child.getAttribute('source'));
            data.skin = parseSkin(child);
            break;

          case 'morph':
            data.id = parseId(child.getAttribute('source'));
            console.warn('THREE.ColladaLoader: Morph target animation not supported yet.');
            break;
        }
      }

      library.controllers[xml.getAttribute('id')] = data;
    }

    function parseSkin(xml) {
      const data = {
        sources: {}
      };

      for (let i = 0, l = xml.childNodes.length; i < l; i++) {
        const child = xml.childNodes[i];
        if (child.nodeType !== 1) continue;

        switch (child.nodeName) {
          case 'bind_shape_matrix':
            data.bindShapeMatrix = parseFloats(child.textContent);
            break;

          case 'source':
            const id = child.getAttribute('id');
            data.sources[id] = parseSource(child);
            break;

          case 'joints':
            data.joints = parseJoints(child);
            break;

          case 'vertex_weights':
            data.vertexWeights = parseVertexWeights(child);
            break;
        }
      }

      return data;
    }

    function parseJoints(xml) {
      const data = {
        inputs: {}
      };

      for (let i = 0, l = xml.childNodes.length; i < l; i++) {
        const child = xml.childNodes[i];
        if (child.nodeType !== 1) continue;

        switch (child.nodeName) {
          case 'input':
            const semantic = child.getAttribute('semantic');
            const id = parseId(child.getAttribute('source'));
            data.inputs[semantic] = id;
            break;
        }
      }

      return data;
    }

    function parseVertexWeights(xml) {
      const data = {
        inputs: {}
      };

      for (let i = 0, l = xml.childNodes.length; i < l; i++) {
        const child = xml.childNodes[i];
        if (child.nodeType !== 1) continue;

        switch (child.nodeName) {
          case 'input':
            const semantic = child.getAttribute('semantic');
            const id = parseId(child.getAttribute('source'));
            const offset = parseInt(child.getAttribute('offset'));
            data.inputs[semantic] = {
              id: id,
              offset: offset
            };
            break;

          case 'vcount':
            data.vcount = parseInts(child.textContent);
            break;

          case 'v':
            data.v = parseInts(child.textContent);
            break;
        }
      }

      return data;
    }

    function buildController(data) {
      const build = {
        id: data.id
      };
      const geometry = library.geometries[build.id];

      if (data.skin !== undefined) {
        build.skin = buildSkin(data.skin); // we enhance the 'sources' property of the corresponding geometry with our skin data

        geometry.sources.skinIndices = build.skin.indices;
        geometry.sources.skinWeights = build.skin.weights;
      }

      return build;
    }

    function buildSkin(data) {
      const BONE_LIMIT = 4;
      const build = {
        joints: [],
        // this must be an array to preserve the joint order
        indices: {
          array: [],
          stride: BONE_LIMIT
        },
        weights: {
          array: [],
          stride: BONE_LIMIT
        }
      };
      const sources = data.sources;
      const vertexWeights = data.vertexWeights;
      const vcount = vertexWeights.vcount;
      const v = vertexWeights.v;
      const jointOffset = vertexWeights.inputs.JOINT.offset;
      const weightOffset = vertexWeights.inputs.WEIGHT.offset;
      const jointSource = data.sources[data.joints.inputs.JOINT];
      const inverseSource = data.sources[data.joints.inputs.INV_BIND_MATRIX];
      const weights = sources[vertexWeights.inputs.WEIGHT.id].array;
      let stride = 0;
      let i, j, l; // procces skin data for each vertex

      for (i = 0, l = vcount.length; i < l; i++) {
        const jointCount = vcount[i]; // this is the amount of joints that affect a single vertex

        const vertexSkinData = [];

        for (j = 0; j < jointCount; j++) {
          const skinIndex = v[stride + jointOffset];
          const weightId = v[stride + weightOffset];
          const skinWeight = weights[weightId];
          vertexSkinData.push({
            index: skinIndex,
            weight: skinWeight
          });
          stride += 2;
        } // we sort the joints in descending order based on the weights.
        // this ensures, we only procced the most important joints of the vertex


        vertexSkinData.sort(descending); // now we provide for each vertex a set of four index and weight values.
        // the order of the skin data matches the order of vertices

        for (j = 0; j < BONE_LIMIT; j++) {
          const d = vertexSkinData[j];

          if (d !== undefined) {
            build.indices.array.push(d.index);
            build.weights.array.push(d.weight);
          } else {
            build.indices.array.push(0);
            build.weights.array.push(0);
          }
        }
      } // setup bind matrix


      if (data.bindShapeMatrix) {
        build.bindMatrix = new THREE.Matrix4().fromArray(data.bindShapeMatrix).transpose();
      } else {
        build.bindMatrix = new THREE.Matrix4().identity();
      } // process bones and inverse bind matrix data


      for (i = 0, l = jointSource.array.length; i < l; i++) {
        const name = jointSource.array[i];
        const boneInverse = new THREE.Matrix4().fromArray(inverseSource.array, i * inverseSource.stride).transpose();
        build.joints.push({
          name: name,
          boneInverse: boneInverse
        });
      }

      return build; // array sort function

      function descending(a, b) {
        return b.weight - a.weight;
      }
    }

    function getController(id) {
      return getBuild(library.controllers[id], buildController);
    } // image


    function parseImage(xml) {
      const data = {
        init_from: getElementsByTagName(xml, 'init_from')[0].textContent
      };
      library.images[xml.getAttribute('id')] = data;
    }

    function buildImage(data) {
      if (data.build !== undefined) return data.build;
      return data.init_from;
    }

    function getImage(id) {
      const data = library.images[id];

      if (data !== undefined) {
        return getBuild(data, buildImage);
      }

      console.warn('THREE.ColladaLoader: Couldn\'t find image with ID:', id);
      return null;
    } // effect


    function parseEffect(xml) {
      const data = {};

      for (let i = 0, l = xml.childNodes.length; i < l; i++) {
        const child = xml.childNodes[i];
        if (child.nodeType !== 1) continue;

        switch (child.nodeName) {
          case 'profile_COMMON':
            data.profile = parseEffectProfileCOMMON(child);
            break;
        }
      }

      library.effects[xml.getAttribute('id')] = data;
    }

    function parseEffectProfileCOMMON(xml) {
      const data = {
        surfaces: {},
        samplers: {}
      };

      for (let i = 0, l = xml.childNodes.length; i < l; i++) {
        const child = xml.childNodes[i];
        if (child.nodeType !== 1) continue;

        switch (child.nodeName) {
          case 'newparam':
            parseEffectNewparam(child, data);
            break;

          case 'technique':
            data.technique = parseEffectTechnique(child);
            break;

          case 'extra':
            data.extra = parseEffectExtra(child);
            break;
        }
      }

      return data;
    }

    function parseEffectNewparam(xml, data) {
      const sid = xml.getAttribute('sid');

      for (let i = 0, l = xml.childNodes.length; i < l; i++) {
        const child = xml.childNodes[i];
        if (child.nodeType !== 1) continue;

        switch (child.nodeName) {
          case 'surface':
            data.surfaces[sid] = parseEffectSurface(child);
            break;

          case 'sampler2D':
            data.samplers[sid] = parseEffectSampler(child);
            break;
        }
      }
    }

    function parseEffectSurface(xml) {
      const data = {};

      for (let i = 0, l = xml.childNodes.length; i < l; i++) {
        const child = xml.childNodes[i];
        if (child.nodeType !== 1) continue;

        switch (child.nodeName) {
          case 'init_from':
            data.init_from = child.textContent;
            break;
        }
      }

      return data;
    }

    function parseEffectSampler(xml) {
      const data = {};

      for (let i = 0, l = xml.childNodes.length; i < l; i++) {
        const child = xml.childNodes[i];
        if (child.nodeType !== 1) continue;

        switch (child.nodeName) {
          case 'source':
            data.source = child.textContent;
            break;
        }
      }

      return data;
    }

    function parseEffectTechnique(xml) {
      const data = {};

      for (let i = 0, l = xml.childNodes.length; i < l; i++) {
        const child = xml.childNodes[i];
        if (child.nodeType !== 1) continue;

        switch (child.nodeName) {
          case 'constant':
          case 'lambert':
          case 'blinn':
          case 'phong':
            data.type = child.nodeName;
            data.parameters = parseEffectParameters(child);
            break;
        }
      }

      return data;
    }

    function parseEffectParameters(xml) {
      const data = {};

      for (let i = 0, l = xml.childNodes.length; i < l; i++) {
        const child = xml.childNodes[i];
        if (child.nodeType !== 1) continue;

        switch (child.nodeName) {
          case 'emission':
          case 'diffuse':
          case 'specular':
          case 'bump':
          case 'ambient':
          case 'shininess':
          case 'transparency':
            data[child.nodeName] = parseEffectParameter(child);
            break;

          case 'transparent':
            data[child.nodeName] = {
              opaque: child.getAttribute('opaque'),
              data: parseEffectParameter(child)
            };
            break;
        }
      }

      return data;
    }

    function parseEffectParameter(xml) {
      const data = {};

      for (let i = 0, l = xml.childNodes.length; i < l; i++) {
        const child = xml.childNodes[i];
        if (child.nodeType !== 1) continue;

        switch (child.nodeName) {
          case 'color':
            data[child.nodeName] = parseFloats(child.textContent);
            break;

          case 'float':
            data[child.nodeName] = parseFloat(child.textContent);
            break;

          case 'texture':
            data[child.nodeName] = {
              id: child.getAttribute('texture'),
              extra: parseEffectParameterTexture(child)
            };
            break;
        }
      }

      return data;
    }

    function parseEffectParameterTexture(xml) {
      const data = {
        technique: {}
      };

      for (let i = 0, l = xml.childNodes.length; i < l; i++) {
        const child = xml.childNodes[i];
        if (child.nodeType !== 1) continue;

        switch (child.nodeName) {
          case 'extra':
            parseEffectParameterTextureExtra(child, data);
            break;
        }
      }

      return data;
    }

    function parseEffectParameterTextureExtra(xml, data) {
      for (let i = 0, l = xml.childNodes.length; i < l; i++) {
        const child = xml.childNodes[i];
        if (child.nodeType !== 1) continue;

        switch (child.nodeName) {
          case 'technique':
            parseEffectParameterTextureExtraTechnique(child, data);
            break;
        }
      }
    }

    function parseEffectParameterTextureExtraTechnique(xml, data) {
      for (let i = 0, l = xml.childNodes.length; i < l; i++) {
        const child = xml.childNodes[i];
        if (child.nodeType !== 1) continue;

        switch (child.nodeName) {
          case 'repeatU':
          case 'repeatV':
          case 'offsetU':
          case 'offsetV':
            data.technique[child.nodeName] = parseFloat(child.textContent);
            break;

          case 'wrapU':
          case 'wrapV':
            // some files have values for wrapU/wrapV which become NaN via parseInt
            if (child.textContent.toUpperCase() === 'TRUE') {
              data.technique[child.nodeName] = 1;
            } else if (child.textContent.toUpperCase() === 'FALSE') {
              data.technique[child.nodeName] = 0;
            } else {
              data.technique[child.nodeName] = parseInt(child.textContent);
            }

            break;
        }
      }
    }

    function parseEffectExtra(xml) {
      const data = {};

      for (let i = 0, l = xml.childNodes.length; i < l; i++) {
        const child = xml.childNodes[i];
        if (child.nodeType !== 1) continue;

        switch (child.nodeName) {
          case 'technique':
            data.technique = parseEffectExtraTechnique(child);
            break;
        }
      }

      return data;
    }

    function parseEffectExtraTechnique(xml) {
      const data = {};

      for (let i = 0, l = xml.childNodes.length; i < l; i++) {
        const child = xml.childNodes[i];
        if (child.nodeType !== 1) continue;

        switch (child.nodeName) {
          case 'double_sided':
            data[child.nodeName] = parseInt(child.textContent);
            break;
        }
      }

      return data;
    }

    function buildEffect(data) {
      return data;
    }

    function getEffect(id) {
      return getBuild(library.effects[id], buildEffect);
    } // material


    function parseMaterial(xml) {
      const data = {
        name: xml.getAttribute('name')
      };

      for (let i = 0, l = xml.childNodes.length; i < l; i++) {
        const child = xml.childNodes[i];
        if (child.nodeType !== 1) continue;

        switch (child.nodeName) {
          case 'instance_effect':
            data.url = parseId(child.getAttribute('url'));
            break;
        }
      }

      library.materials[xml.getAttribute('id')] = data;
    }

    function getTextureLoader(image) {
      let loader;
      let extension = image.slice((image.lastIndexOf('.') - 1 >>> 0) + 2); // http://www.jstips.co/en/javascript/get-file-extension/

      extension = extension.toLowerCase();

      switch (extension) {
        case 'tga':
          loader = tgaLoader;
          break;

        default:
          loader = textureLoader;
      }

      return loader;
    }

    function buildMaterial(data) {
      const effect = getEffect(data.url);
      const technique = effect.profile.technique;
      const extra = effect.profile.extra;
      let material;

      switch (technique.type) {
        case 'phong':
        case 'blinn':
          material = new THREE.MeshPhongMaterial();
          break;

        case 'lambert':
          material = new THREE.MeshLambertMaterial();
          break;

        default:
          material = new THREE.MeshBasicMaterial();
          break;
      }

      material.name = data.name || '';

      function getTexture(textureObject) {
        const sampler = effect.profile.samplers[textureObject.id];
        let image = null; // get image

        if (sampler !== undefined) {
          const surface = effect.profile.surfaces[sampler.source];
          image = getImage(surface.init_from);
        } else {
          console.warn('THREE.ColladaLoader: Undefined sampler. Access image directly (see #12530).');
          image = getImage(textureObject.id);
        } // create texture if image is avaiable


        if (image !== null) {
          const loader = getTextureLoader(image);

          if (loader !== undefined) {
            const texture = loader.load(image);
            const extra = textureObject.extra;

            if (extra !== undefined && extra.technique !== undefined && isEmpty(extra.technique) === false) {
              const technique = extra.technique;
              texture.wrapS = technique.wrapU ? THREE.RepeatWrapping : THREE.ClampToEdgeWrapping;
              texture.wrapT = technique.wrapV ? THREE.RepeatWrapping : THREE.ClampToEdgeWrapping;
              texture.offset.set(technique.offsetU || 0, technique.offsetV || 0);
              texture.repeat.set(technique.repeatU || 1, technique.repeatV || 1);
            } else {
              texture.wrapS = THREE.RepeatWrapping;
              texture.wrapT = THREE.RepeatWrapping;
            }

            return texture;
          } else {
            console.warn('THREE.ColladaLoader: THREE.Loader for texture %s not found.', image);
            return null;
          }
        } else {
          console.warn('THREE.ColladaLoader: Couldn\'t create texture with ID:', textureObject.id);
          return null;
        }
      }

      const parameters = technique.parameters;

      for (const key in parameters) {
        const parameter = parameters[key];

        switch (key) {
          case 'diffuse':
            if (parameter.color) material.color.fromArray(parameter.color);
            if (parameter.texture) material.map = getTexture(parameter.texture);
            break;

          case 'specular':
            if (parameter.color && material.specular) material.specular.fromArray(parameter.color);
            if (parameter.texture) material.specularMap = getTexture(parameter.texture);
            break;

          case 'bump':
            if (parameter.texture) material.normalMap = getTexture(parameter.texture);
            break;

          case 'ambient':
            if (parameter.texture) material.lightMap = getTexture(parameter.texture);
            break;

          case 'shininess':
            if (parameter.float && material.shininess) material.shininess = parameter.float;
            break;

          case 'emission':
            if (parameter.color && material.emissive) material.emissive.fromArray(parameter.color);
            if (parameter.texture) material.emissiveMap = getTexture(parameter.texture);
            break;
        }
      } //


      let transparent = parameters['transparent'];
      let transparency = parameters['transparency']; // <transparency> does not exist but <transparent>

      if (transparency === undefined && transparent) {
        transparency = {
          float: 1
        };
      } // <transparent> does not exist but <transparency>


      if (transparent === undefined && transparency) {
        transparent = {
          opaque: 'A_ONE',
          data: {
            color: [1, 1, 1, 1]
          }
        };
      }

      if (transparent && transparency) {
        // handle case if a texture exists but no color
        if (transparent.data.texture) {
          // we do not set an alpha map (see #13792)
          material.transparent = true;
        } else {
          const color = transparent.data.color;

          switch (transparent.opaque) {
            case 'A_ONE':
              material.opacity = color[3] * transparency.float;
              break;

            case 'RGB_ZERO':
              material.opacity = 1 - color[0] * transparency.float;
              break;

            case 'A_ZERO':
              material.opacity = 1 - color[3] * transparency.float;
              break;

            case 'RGB_ONE':
              material.opacity = color[0] * transparency.float;
              break;

            default:
              console.warn('THREE.ColladaLoader: Invalid opaque type "%s" of transparent tag.', transparent.opaque);
          }

          if (material.opacity < 1) material.transparent = true;
        }
      } //


      if (extra !== undefined && extra.technique !== undefined && extra.technique.double_sided === 1) {
        material.side = THREE.DoubleSide;
      }

      return material;
    }

    function getMaterial(id) {
      return getBuild(library.materials[id], buildMaterial);
    } // camera


    function parseCamera(xml) {
      const data = {
        name: xml.getAttribute('name')
      };

      for (let i = 0, l = xml.childNodes.length; i < l; i++) {
        const child = xml.childNodes[i];
        if (child.nodeType !== 1) continue;

        switch (child.nodeName) {
          case 'optics':
            data.optics = parseCameraOptics(child);
            break;
        }
      }

      library.cameras[xml.getAttribute('id')] = data;
    }

    function parseCameraOptics(xml) {
      for (let i = 0; i < xml.childNodes.length; i++) {
        const child = xml.childNodes[i];

        switch (child.nodeName) {
          case 'technique_common':
            return parseCameraTechnique(child);
        }
      }

      return {};
    }

    function parseCameraTechnique(xml) {
      const data = {};

      for (let i = 0; i < xml.childNodes.length; i++) {
        const child = xml.childNodes[i];

        switch (child.nodeName) {
          case 'perspective':
          case 'orthographic':
            data.technique = child.nodeName;
            data.parameters = parseCameraParameters(child);
            break;
        }
      }

      return data;
    }

    function parseCameraParameters(xml) {
      const data = {};

      for (let i = 0; i < xml.childNodes.length; i++) {
        const child = xml.childNodes[i];

        switch (child.nodeName) {
          case 'xfov':
          case 'yfov':
          case 'xmag':
          case 'ymag':
          case 'znear':
          case 'zfar':
          case 'aspect_ratio':
            data[child.nodeName] = parseFloat(child.textContent);
            break;
        }
      }

      return data;
    }

    function buildCamera(data) {
      let camera;

      switch (data.optics.technique) {
        case 'perspective':
          camera = new THREE.PerspectiveCamera(data.optics.parameters.yfov, data.optics.parameters.aspect_ratio, data.optics.parameters.znear, data.optics.parameters.zfar);
          break;

        case 'orthographic':
          let ymag = data.optics.parameters.ymag;
          let xmag = data.optics.parameters.xmag;
          const aspectRatio = data.optics.parameters.aspect_ratio;
          xmag = xmag === undefined ? ymag * aspectRatio : xmag;
          ymag = ymag === undefined ? xmag / aspectRatio : ymag;
          xmag *= 0.5;
          ymag *= 0.5;
          camera = new THREE.OrthographicCamera(-xmag, xmag, ymag, -ymag, // left, right, top, bottom
          data.optics.parameters.znear, data.optics.parameters.zfar);
          break;

        default:
          camera = new THREE.PerspectiveCamera();
          break;
      }

      camera.name = data.name || '';
      return camera;
    }

    function getCamera(id) {
      const data = library.cameras[id];

      if (data !== undefined) {
        return getBuild(data, buildCamera);
      }

      console.warn('THREE.ColladaLoader: Couldn\'t find camera with ID:', id);
      return null;
    } // light


    function parseLight(xml) {
      let data = {};

      for (let i = 0, l = xml.childNodes.length; i < l; i++) {
        const child = xml.childNodes[i];
        if (child.nodeType !== 1) continue;

        switch (child.nodeName) {
          case 'technique_common':
            data = parseLightTechnique(child);
            break;
        }
      }

      library.lights[xml.getAttribute('id')] = data;
    }

    function parseLightTechnique(xml) {
      const data = {};

      for (let i = 0, l = xml.childNodes.length; i < l; i++) {
        const child = xml.childNodes[i];
        if (child.nodeType !== 1) continue;

        switch (child.nodeName) {
          case 'directional':
          case 'point':
          case 'spot':
          case 'ambient':
            data.technique = child.nodeName;
            data.parameters = parseLightParameters(child);
        }
      }

      return data;
    }

    function parseLightParameters(xml) {
      const data = {};

      for (let i = 0, l = xml.childNodes.length; i < l; i++) {
        const child = xml.childNodes[i];
        if (child.nodeType !== 1) continue;

        switch (child.nodeName) {
          case 'color':
            const array = parseFloats(child.textContent);
            data.color = new THREE.Color().fromArray(array);
            break;

          case 'falloff_angle':
            data.falloffAngle = parseFloat(child.textContent);
            break;

          case 'quadratic_attenuation':
            const f = parseFloat(child.textContent);
            data.distance = f ? Math.sqrt(1 / f) : 0;
            break;
        }
      }

      return data;
    }

    function buildLight(data) {
      let light;

      switch (data.technique) {
        case 'directional':
          light = new THREE.DirectionalLight();
          break;

        case 'point':
          light = new THREE.PointLight();
          break;

        case 'spot':
          light = new THREE.SpotLight();
          break;

        case 'ambient':
          light = new THREE.AmbientLight();
          break;
      }

      if (data.parameters.color) light.color.copy(data.parameters.color);
      if (data.parameters.distance) light.distance = data.parameters.distance;
      return light;
    }

    function getLight(id) {
      const data = library.lights[id];

      if (data !== undefined) {
        return getBuild(data, buildLight);
      }

      console.warn('THREE.ColladaLoader: Couldn\'t find light with ID:', id);
      return null;
    } // geometry


    function parseGeometry(xml) {
      const data = {
        name: xml.getAttribute('name'),
        sources: {},
        vertices: {},
        primitives: []
      };
      const mesh = getElementsByTagName(xml, 'mesh')[0]; // the following tags inside geometry are not supported yet (see https://github.com/mrdoob/three.js/pull/12606): convex_mesh, spline, brep

      if (mesh === undefined) return;

      for (let i = 0; i < mesh.childNodes.length; i++) {
        const child = mesh.childNodes[i];
        if (child.nodeType !== 1) continue;
        const id = child.getAttribute('id');

        switch (child.nodeName) {
          case 'source':
            data.sources[id] = parseSource(child);
            break;

          case 'vertices':
            // data.sources[ id ] = data.sources[ parseId( getElementsByTagName( child, 'input' )[ 0 ].getAttribute( 'source' ) ) ];
            data.vertices = parseGeometryVertices(child);
            break;

          case 'polygons':
            console.warn('THREE.ColladaLoader: Unsupported primitive type: ', child.nodeName);
            break;

          case 'lines':
          case 'linestrips':
          case 'polylist':
          case 'triangles':
            data.primitives.push(parseGeometryPrimitive(child));
            break;

          default:
            console.log(child);
        }
      }

      library.geometries[xml.getAttribute('id')] = data;
    }

    function parseSource(xml) {
      const data = {
        array: [],
        stride: 3
      };

      for (let i = 0; i < xml.childNodes.length; i++) {
        const child = xml.childNodes[i];
        if (child.nodeType !== 1) continue;

        switch (child.nodeName) {
          case 'float_array':
            data.array = parseFloats(child.textContent);
            break;

          case 'Name_array':
            data.array = parseStrings(child.textContent);
            break;

          case 'technique_common':
            const accessor = getElementsByTagName(child, 'accessor')[0];

            if (accessor !== undefined) {
              data.stride = parseInt(accessor.getAttribute('stride'));
            }

            break;
        }
      }

      return data;
    }

    function parseGeometryVertices(xml) {
      const data = {};

      for (let i = 0; i < xml.childNodes.length; i++) {
        const child = xml.childNodes[i];
        if (child.nodeType !== 1) continue;
        data[child.getAttribute('semantic')] = parseId(child.getAttribute('source'));
      }

      return data;
    }

    function parseGeometryPrimitive(xml) {
      const primitive = {
        type: xml.nodeName,
        material: xml.getAttribute('material'),
        count: parseInt(xml.getAttribute('count')),
        inputs: {},
        stride: 0,
        hasUV: false
      };

      for (let i = 0, l = xml.childNodes.length; i < l; i++) {
        const child = xml.childNodes[i];
        if (child.nodeType !== 1) continue;

        switch (child.nodeName) {
          case 'input':
            const id = parseId(child.getAttribute('source'));
            const semantic = child.getAttribute('semantic');
            const offset = parseInt(child.getAttribute('offset'));
            const set = parseInt(child.getAttribute('set'));
            const inputname = set > 0 ? semantic + set : semantic;
            primitive.inputs[inputname] = {
              id: id,
              offset: offset
            };
            primitive.stride = Math.max(primitive.stride, offset + 1);
            if (semantic === 'TEXCOORD') primitive.hasUV = true;
            break;

          case 'vcount':
            primitive.vcount = parseInts(child.textContent);
            break;

          case 'p':
            primitive.p = parseInts(child.textContent);
            break;
        }
      }

      return primitive;
    }

    function groupPrimitives(primitives) {
      const build = {};

      for (let i = 0; i < primitives.length; i++) {
        const primitive = primitives[i];
        if (build[primitive.type] === undefined) build[primitive.type] = [];
        build[primitive.type].push(primitive);
      }

      return build;
    }

    function checkUVCoordinates(primitives) {
      let count = 0;

      for (let i = 0, l = primitives.length; i < l; i++) {
        const primitive = primitives[i];

        if (primitive.hasUV === true) {
          count++;
        }
      }

      if (count > 0 && count < primitives.length) {
        primitives.uvsNeedsFix = true;
      }
    }

    function buildGeometry(data) {
      const build = {};
      const sources = data.sources;
      const vertices = data.vertices;
      const primitives = data.primitives;
      if (primitives.length === 0) return {}; // our goal is to create one buffer geometry for a single type of primitives
      // first, we group all primitives by their type

      const groupedPrimitives = groupPrimitives(primitives);

      for (const type in groupedPrimitives) {
        const primitiveType = groupedPrimitives[type]; // second, ensure consistent uv coordinates for each type of primitives (polylist,triangles or lines)

        checkUVCoordinates(primitiveType); // third, create a buffer geometry for each type of primitives

        build[type] = buildGeometryType(primitiveType, sources, vertices);
      }

      return build;
    }

    function buildGeometryType(primitives, sources, vertices) {
      const build = {};
      const position = {
        array: [],
        stride: 0
      };
      const normal = {
        array: [],
        stride: 0
      };
      const uv = {
        array: [],
        stride: 0
      };
      const uv2 = {
        array: [],
        stride: 0
      };
      const color = {
        array: [],
        stride: 0
      };
      const skinIndex = {
        array: [],
        stride: 4
      };
      const skinWeight = {
        array: [],
        stride: 4
      };
      const geometry = new THREE.BufferGeometry();
      const materialKeys = [];
      let start = 0;

      for (let p = 0; p < primitives.length; p++) {
        const primitive = primitives[p];
        const inputs = primitive.inputs; // groups

        let count = 0;

        switch (primitive.type) {
          case 'lines':
          case 'linestrips':
            count = primitive.count * 2;
            break;

          case 'triangles':
            count = primitive.count * 3;
            break;

          case 'polylist':
            for (let g = 0; g < primitive.count; g++) {
              const vc = primitive.vcount[g];

              switch (vc) {
                case 3:
                  count += 3; // single triangle

                  break;

                case 4:
                  count += 6; // quad, subdivided into two triangles

                  break;

                default:
                  count += (vc - 2) * 3; // polylist with more than four vertices

                  break;
              }
            }

            break;

          default:
            console.warn('THREE.ColladaLoader: Unknow primitive type:', primitive.type);
        }

        geometry.addGroup(start, count, p);
        start += count; // material

        if (primitive.material) {
          materialKeys.push(primitive.material);
        } // geometry data


        for (const name in inputs) {
          const input = inputs[name];

          switch (name) {
            case 'VERTEX':
              for (const key in vertices) {
                const id = vertices[key];

                switch (key) {
                  case 'POSITION':
                    const prevLength = position.array.length;
                    buildGeometryData(primitive, sources[id], input.offset, position.array);
                    position.stride = sources[id].stride;

                    if (sources.skinWeights && sources.skinIndices) {
                      buildGeometryData(primitive, sources.skinIndices, input.offset, skinIndex.array);
                      buildGeometryData(primitive, sources.skinWeights, input.offset, skinWeight.array);
                    } // see #3803


                    if (primitive.hasUV === false && primitives.uvsNeedsFix === true) {
                      const count = (position.array.length - prevLength) / position.stride;

                      for (let i = 0; i < count; i++) {
                        // fill missing uv coordinates
                        uv.array.push(0, 0);
                      }
                    }

                    break;

                  case 'NORMAL':
                    buildGeometryData(primitive, sources[id], input.offset, normal.array);
                    normal.stride = sources[id].stride;
                    break;

                  case 'COLOR':
                    buildGeometryData(primitive, sources[id], input.offset, color.array);
                    color.stride = sources[id].stride;
                    break;

                  case 'TEXCOORD':
                    buildGeometryData(primitive, sources[id], input.offset, uv.array);
                    uv.stride = sources[id].stride;
                    break;

                  case 'TEXCOORD1':
                    buildGeometryData(primitive, sources[id], input.offset, uv2.array);
                    uv.stride = sources[id].stride;
                    break;

                  default:
                    console.warn('THREE.ColladaLoader: Semantic "%s" not handled in geometry build process.', key);
                }
              }

              break;

            case 'NORMAL':
              buildGeometryData(primitive, sources[input.id], input.offset, normal.array);
              normal.stride = sources[input.id].stride;
              break;

            case 'COLOR':
              buildGeometryData(primitive, sources[input.id], input.offset, color.array);
              color.stride = sources[input.id].stride;
              break;

            case 'TEXCOORD':
              buildGeometryData(primitive, sources[input.id], input.offset, uv.array);
              uv.stride = sources[input.id].stride;
              break;

            case 'TEXCOORD1':
              buildGeometryData(primitive, sources[input.id], input.offset, uv2.array);
              uv2.stride = sources[input.id].stride;
              break;
          }
        }
      } // build geometry


      if (position.array.length > 0) geometry.setAttribute('position', new THREE.Float32BufferAttribute(position.array, position.stride));
      if (normal.array.length > 0) geometry.setAttribute('normal', new THREE.Float32BufferAttribute(normal.array, normal.stride));
      if (color.array.length > 0) geometry.setAttribute('color', new THREE.Float32BufferAttribute(color.array, color.stride));
      if (uv.array.length > 0) geometry.setAttribute('uv', new THREE.Float32BufferAttribute(uv.array, uv.stride));
      if (uv2.array.length > 0) geometry.setAttribute('uv2', new THREE.Float32BufferAttribute(uv2.array, uv2.stride));
      if (skinIndex.array.length > 0) geometry.setAttribute('skinIndex', new THREE.Float32BufferAttribute(skinIndex.array, skinIndex.stride));
      if (skinWeight.array.length > 0) geometry.setAttribute('skinWeight', new THREE.Float32BufferAttribute(skinWeight.array, skinWeight.stride));
      build.data = geometry;
      build.type = primitives[0].type;
      build.materialKeys = materialKeys;
      return build;
    }

    function buildGeometryData(primitive, source, offset, array) {
      const indices = primitive.p;
      const stride = primitive.stride;
      const vcount = primitive.vcount;

      function pushVector(i) {
        let index = indices[i + offset] * sourceStride;
        const length = index + sourceStride;

        for (; index < length; index++) {
          array.push(sourceArray[index]);
        }
      }

      const sourceArray = source.array;
      const sourceStride = source.stride;

      if (primitive.vcount !== undefined) {
        let index = 0;

        for (let i = 0, l = vcount.length; i < l; i++) {
          const count = vcount[i];

          if (count === 4) {
            const a = index + stride * 0;
            const b = index + stride * 1;
            const c = index + stride * 2;
            const d = index + stride * 3;
            pushVector(a);
            pushVector(b);
            pushVector(d);
            pushVector(b);
            pushVector(c);
            pushVector(d);
          } else if (count === 3) {
            const a = index + stride * 0;
            const b = index + stride * 1;
            const c = index + stride * 2;
            pushVector(a);
            pushVector(b);
            pushVector(c);
          } else if (count > 4) {
            for (let k = 1, kl = count - 2; k <= kl; k++) {
              const a = index + stride * 0;
              const b = index + stride * k;
              const c = index + stride * (k + 1);
              pushVector(a);
              pushVector(b);
              pushVector(c);
            }
          }

          index += stride * count;
        }
      } else {
        for (let i = 0, l = indices.length; i < l; i += stride) {
          pushVector(i);
        }
      }
    }

    function getGeometry(id) {
      return getBuild(library.geometries[id], buildGeometry);
    } // kinematics


    function parseKinematicsModel(xml) {
      const data = {
        name: xml.getAttribute('name') || '',
        joints: {},
        links: []
      };

      for (let i = 0; i < xml.childNodes.length; i++) {
        const child = xml.childNodes[i];
        if (child.nodeType !== 1) continue;

        switch (child.nodeName) {
          case 'technique_common':
            parseKinematicsTechniqueCommon(child, data);
            break;
        }
      }

      library.kinematicsModels[xml.getAttribute('id')] = data;
    }

    function buildKinematicsModel(data) {
      if (data.build !== undefined) return data.build;
      return data;
    }

    function getKinematicsModel(id) {
      return getBuild(library.kinematicsModels[id], buildKinematicsModel);
    }

    function parseKinematicsTechniqueCommon(xml, data) {
      for (let i = 0; i < xml.childNodes.length; i++) {
        const child = xml.childNodes[i];
        if (child.nodeType !== 1) continue;

        switch (child.nodeName) {
          case 'joint':
            data.joints[child.getAttribute('sid')] = parseKinematicsJoint(child);
            break;

          case 'link':
            data.links.push(parseKinematicsLink(child));
            break;
        }
      }
    }

    function parseKinematicsJoint(xml) {
      let data;

      for (let i = 0; i < xml.childNodes.length; i++) {
        const child = xml.childNodes[i];
        if (child.nodeType !== 1) continue;

        switch (child.nodeName) {
          case 'prismatic':
          case 'revolute':
            data = parseKinematicsJointParameter(child);
            break;
        }
      }

      return data;
    }

    function parseKinematicsJointParameter(xml) {
      const data = {
        sid: xml.getAttribute('sid'),
        name: xml.getAttribute('name') || '',
        axis: new THREE.Vector3(),
        limits: {
          min: 0,
          max: 0
        },
        type: xml.nodeName,
        static: false,
        zeroPosition: 0,
        middlePosition: 0
      };

      for (let i = 0; i < xml.childNodes.length; i++) {
        const child = xml.childNodes[i];
        if (child.nodeType !== 1) continue;

        switch (child.nodeName) {
          case 'axis':
            const array = parseFloats(child.textContent);
            data.axis.fromArray(array);
            break;

          case 'limits':
            const max = child.getElementsByTagName('max')[0];
            const min = child.getElementsByTagName('min')[0];
            data.limits.max = parseFloat(max.textContent);
            data.limits.min = parseFloat(min.textContent);
            break;
        }
      } // if min is equal to or greater than max, consider the joint static


      if (data.limits.min >= data.limits.max) {
        data.static = true;
      } // calculate middle position


      data.middlePosition = (data.limits.min + data.limits.max) / 2.0;
      return data;
    }

    function parseKinematicsLink(xml) {
      const data = {
        sid: xml.getAttribute('sid'),
        name: xml.getAttribute('name') || '',
        attachments: [],
        transforms: []
      };

      for (let i = 0; i < xml.childNodes.length; i++) {
        const child = xml.childNodes[i];
        if (child.nodeType !== 1) continue;

        switch (child.nodeName) {
          case 'attachment_full':
            data.attachments.push(parseKinematicsAttachment(child));
            break;

          case 'matrix':
          case 'translate':
          case 'rotate':
            data.transforms.push(parseKinematicsTransform(child));
            break;
        }
      }

      return data;
    }

    function parseKinematicsAttachment(xml) {
      const data = {
        joint: xml.getAttribute('joint').split('/').pop(),
        transforms: [],
        links: []
      };

      for (let i = 0; i < xml.childNodes.length; i++) {
        const child = xml.childNodes[i];
        if (child.nodeType !== 1) continue;

        switch (child.nodeName) {
          case 'link':
            data.links.push(parseKinematicsLink(child));
            break;

          case 'matrix':
          case 'translate':
          case 'rotate':
            data.transforms.push(parseKinematicsTransform(child));
            break;
        }
      }

      return data;
    }

    function parseKinematicsTransform(xml) {
      const data = {
        type: xml.nodeName
      };
      const array = parseFloats(xml.textContent);

      switch (data.type) {
        case 'matrix':
          data.obj = new THREE.Matrix4();
          data.obj.fromArray(array).transpose();
          break;

        case 'translate':
          data.obj = new THREE.Vector3();
          data.obj.fromArray(array);
          break;

        case 'rotate':
          data.obj = new THREE.Vector3();
          data.obj.fromArray(array);
          data.angle = THREE.MathUtils.degToRad(array[3]);
          break;
      }

      return data;
    } // physics


    function parsePhysicsModel(xml) {
      const data = {
        name: xml.getAttribute('name') || '',
        rigidBodies: {}
      };

      for (let i = 0; i < xml.childNodes.length; i++) {
        const child = xml.childNodes[i];
        if (child.nodeType !== 1) continue;

        switch (child.nodeName) {
          case 'rigid_body':
            data.rigidBodies[child.getAttribute('name')] = {};
            parsePhysicsRigidBody(child, data.rigidBodies[child.getAttribute('name')]);
            break;
        }
      }

      library.physicsModels[xml.getAttribute('id')] = data;
    }

    function parsePhysicsRigidBody(xml, data) {
      for (let i = 0; i < xml.childNodes.length; i++) {
        const child = xml.childNodes[i];
        if (child.nodeType !== 1) continue;

        switch (child.nodeName) {
          case 'technique_common':
            parsePhysicsTechniqueCommon(child, data);
            break;
        }
      }
    }

    function parsePhysicsTechniqueCommon(xml, data) {
      for (let i = 0; i < xml.childNodes.length; i++) {
        const child = xml.childNodes[i];
        if (child.nodeType !== 1) continue;

        switch (child.nodeName) {
          case 'inertia':
            data.inertia = parseFloats(child.textContent);
            break;

          case 'mass':
            data.mass = parseFloats(child.textContent)[0];
            break;
        }
      }
    } // scene


    function parseKinematicsScene(xml) {
      const data = {
        bindJointAxis: []
      };

      for (let i = 0; i < xml.childNodes.length; i++) {
        const child = xml.childNodes[i];
        if (child.nodeType !== 1) continue;

        switch (child.nodeName) {
          case 'bind_joint_axis':
            data.bindJointAxis.push(parseKinematicsBindJointAxis(child));
            break;
        }
      }

      library.kinematicsScenes[parseId(xml.getAttribute('url'))] = data;
    }

    function parseKinematicsBindJointAxis(xml) {
      const data = {
        target: xml.getAttribute('target').split('/').pop()
      };

      for (let i = 0; i < xml.childNodes.length; i++) {
        const child = xml.childNodes[i];
        if (child.nodeType !== 1) continue;

        switch (child.nodeName) {
          case 'axis':
            const param = child.getElementsByTagName('param')[0];
            data.axis = param.textContent;
            const tmpJointIndex = data.axis.split('inst_').pop().split('axis')[0];
            data.jointIndex = tmpJointIndex.substr(0, tmpJointIndex.length - 1);
            break;
        }
      }

      return data;
    }

    function buildKinematicsScene(data) {
      if (data.build !== undefined) return data.build;
      return data;
    }

    function getKinematicsScene(id) {
      return getBuild(library.kinematicsScenes[id], buildKinematicsScene);
    }

    function setupKinematics() {
      const kinematicsModelId = Object.keys(library.kinematicsModels)[0];
      const kinematicsSceneId = Object.keys(library.kinematicsScenes)[0];
      const visualSceneId = Object.keys(library.visualScenes)[0];
      if (kinematicsModelId === undefined || kinematicsSceneId === undefined) return;
      const kinematicsModel = getKinematicsModel(kinematicsModelId);
      const kinematicsScene = getKinematicsScene(kinematicsSceneId);
      const visualScene = getVisualScene(visualSceneId);
      const bindJointAxis = kinematicsScene.bindJointAxis;
      const jointMap = {};

      for (let i = 0, l = bindJointAxis.length; i < l; i++) {
        const axis = bindJointAxis[i]; // the result of the following query is an element of type 'translate', 'rotate','scale' or 'matrix'

        const targetElement = collada.querySelector('[sid="' + axis.target + '"]');

        if (targetElement) {
          // get the parent of the transform element
          const parentVisualElement = targetElement.parentElement; // connect the joint of the kinematics model with the element in the visual scene

          connect(axis.jointIndex, parentVisualElement);
        }
      }

      function connect(jointIndex, visualElement) {
        const visualElementName = visualElement.getAttribute('name');
        const joint = kinematicsModel.joints[jointIndex];
        visualScene.traverse(function (object) {
          if (object.name === visualElementName) {
            jointMap[jointIndex] = {
              object: object,
              transforms: buildTransformList(visualElement),
              joint: joint,
              position: joint.zeroPosition
            };
          }
        });
      }

      const m0 = new THREE.Matrix4();
      kinematics = {
        joints: kinematicsModel && kinematicsModel.joints,
        getJointValue: function (jointIndex) {
          const jointData = jointMap[jointIndex];

          if (jointData) {
            return jointData.position;
          } else {
            console.warn('THREE.ColladaLoader: Joint ' + jointIndex + ' doesn\'t exist.');
          }
        },
        setJointValue: function (jointIndex, value) {
          const jointData = jointMap[jointIndex];

          if (jointData) {
            const joint = jointData.joint;

            if (value > joint.limits.max || value < joint.limits.min) {
              console.warn('THREE.ColladaLoader: Joint ' + jointIndex + ' value ' + value + ' outside of limits (min: ' + joint.limits.min + ', max: ' + joint.limits.max + ').');
            } else if (joint.static) {
              console.warn('THREE.ColladaLoader: Joint ' + jointIndex + ' is static.');
            } else {
              const object = jointData.object;
              const axis = joint.axis;
              const transforms = jointData.transforms;
              matrix.identity(); // each update, we have to apply all transforms in the correct order

              for (let i = 0; i < transforms.length; i++) {
                const transform = transforms[i]; // if there is a connection of the transform node with a joint, apply the joint value

                if (transform.sid && transform.sid.indexOf(jointIndex) !== -1) {
                  switch (joint.type) {
                    case 'revolute':
                      matrix.multiply(m0.makeRotationAxis(axis, THREE.MathUtils.degToRad(value)));
                      break;

                    case 'prismatic':
                      matrix.multiply(m0.makeTranslation(axis.x * value, axis.y * value, axis.z * value));
                      break;

                    default:
                      console.warn('THREE.ColladaLoader: Unknown joint type: ' + joint.type);
                      break;
                  }
                } else {
                  switch (transform.type) {
                    case 'matrix':
                      matrix.multiply(transform.obj);
                      break;

                    case 'translate':
                      matrix.multiply(m0.makeTranslation(transform.obj.x, transform.obj.y, transform.obj.z));
                      break;

                    case 'scale':
                      matrix.scale(transform.obj);
                      break;

                    case 'rotate':
                      matrix.multiply(m0.makeRotationAxis(transform.obj, transform.angle));
                      break;
                  }
                }
              }

              object.matrix.copy(matrix);
              object.matrix.decompose(object.position, object.quaternion, object.scale);
              jointMap[jointIndex].position = value;
            }
          } else {
            console.log('THREE.ColladaLoader: ' + jointIndex + ' does not exist.');
          }
        }
      };
    }

    function buildTransformList(node) {
      const transforms = [];
      const xml = collada.querySelector('[id="' + node.id + '"]');

      for (let i = 0; i < xml.childNodes.length; i++) {
        const child = xml.childNodes[i];
        if (child.nodeType !== 1) continue;
        let array, vector;

        switch (child.nodeName) {
          case 'matrix':
            array = parseFloats(child.textContent);
            const matrix = new THREE.Matrix4().fromArray(array).transpose();
            transforms.push({
              sid: child.getAttribute('sid'),
              type: child.nodeName,
              obj: matrix
            });
            break;

          case 'translate':
          case 'scale':
            array = parseFloats(child.textContent);
            vector = new THREE.Vector3().fromArray(array);
            transforms.push({
              sid: child.getAttribute('sid'),
              type: child.nodeName,
              obj: vector
            });
            break;

          case 'rotate':
            array = parseFloats(child.textContent);
            vector = new THREE.Vector3().fromArray(array);
            const angle = THREE.MathUtils.degToRad(array[3]);
            transforms.push({
              sid: child.getAttribute('sid'),
              type: child.nodeName,
              obj: vector,
              angle: angle
            });
            break;
        }
      }

      return transforms;
    } // nodes


    function prepareNodes(xml) {
      const elements = xml.getElementsByTagName('node'); // ensure all node elements have id attributes

      for (let i = 0; i < elements.length; i++) {
        const element = elements[i];

        if (element.hasAttribute('id') === false) {
          element.setAttribute('id', generateId());
        }
      }
    }

    const matrix = new THREE.Matrix4();
    const vector = new THREE.Vector3();

    function parseNode(xml) {
      const data = {
        name: xml.getAttribute('name') || '',
        type: xml.getAttribute('type'),
        id: xml.getAttribute('id'),
        sid: xml.getAttribute('sid'),
        matrix: new THREE.Matrix4(),
        nodes: [],
        instanceCameras: [],
        instanceControllers: [],
        instanceLights: [],
        instanceGeometries: [],
        instanceNodes: [],
        transforms: {}
      };

      for (let i = 0; i < xml.childNodes.length; i++) {
        const child = xml.childNodes[i];
        if (child.nodeType !== 1) continue;
        let array;

        switch (child.nodeName) {
          case 'node':
            data.nodes.push(child.getAttribute('id'));
            parseNode(child);
            break;

          case 'instance_camera':
            data.instanceCameras.push(parseId(child.getAttribute('url')));
            break;

          case 'instance_controller':
            data.instanceControllers.push(parseNodeInstance(child));
            break;

          case 'instance_light':
            data.instanceLights.push(parseId(child.getAttribute('url')));
            break;

          case 'instance_geometry':
            data.instanceGeometries.push(parseNodeInstance(child));
            break;

          case 'instance_node':
            data.instanceNodes.push(parseId(child.getAttribute('url')));
            break;

          case 'matrix':
            array = parseFloats(child.textContent);
            data.matrix.multiply(matrix.fromArray(array).transpose());
            data.transforms[child.getAttribute('sid')] = child.nodeName;
            break;

          case 'translate':
            array = parseFloats(child.textContent);
            vector.fromArray(array);
            data.matrix.multiply(matrix.makeTranslation(vector.x, vector.y, vector.z));
            data.transforms[child.getAttribute('sid')] = child.nodeName;
            break;

          case 'rotate':
            array = parseFloats(child.textContent);
            const angle = THREE.MathUtils.degToRad(array[3]);
            data.matrix.multiply(matrix.makeRotationAxis(vector.fromArray(array), angle));
            data.transforms[child.getAttribute('sid')] = child.nodeName;
            break;

          case 'scale':
            array = parseFloats(child.textContent);
            data.matrix.scale(vector.fromArray(array));
            data.transforms[child.getAttribute('sid')] = child.nodeName;
            break;

          case 'extra':
            break;

          default:
            console.log(child);
        }
      }

      if (hasNode(data.id)) {
        console.warn('THREE.ColladaLoader: There is already a node with ID %s. Exclude current node from further processing.', data.id);
      } else {
        library.nodes[data.id] = data;
      }

      return data;
    }

    function parseNodeInstance(xml) {
      const data = {
        id: parseId(xml.getAttribute('url')),
        materials: {},
        skeletons: []
      };

      for (let i = 0; i < xml.childNodes.length; i++) {
        const child = xml.childNodes[i];

        switch (child.nodeName) {
          case 'bind_material':
            const instances = child.getElementsByTagName('instance_material');

            for (let j = 0; j < instances.length; j++) {
              const instance = instances[j];
              const symbol = instance.getAttribute('symbol');
              const target = instance.getAttribute('target');
              data.materials[symbol] = parseId(target);
            }

            break;

          case 'skeleton':
            data.skeletons.push(parseId(child.textContent));
            break;

          default:
            break;
        }
      }

      return data;
    }

    function buildSkeleton(skeletons, joints) {
      const boneData = [];
      const sortedBoneData = [];
      let i, j, data; // a skeleton can have multiple root bones. collada expresses this
      // situtation with multiple "skeleton" tags per controller instance

      for (i = 0; i < skeletons.length; i++) {
        const skeleton = skeletons[i];
        let root;

        if (hasNode(skeleton)) {
          root = getNode(skeleton);
          buildBoneHierarchy(root, joints, boneData);
        } else if (hasVisualScene(skeleton)) {
          // handle case where the skeleton refers to the visual scene (#13335)
          const visualScene = library.visualScenes[skeleton];
          const children = visualScene.children;

          for (let j = 0; j < children.length; j++) {
            const child = children[j];

            if (child.type === 'JOINT') {
              const root = getNode(child.id);
              buildBoneHierarchy(root, joints, boneData);
            }
          }
        } else {
          console.error('THREE.ColladaLoader: Unable to find root bone of skeleton with ID:', skeleton);
        }
      } // sort bone data (the order is defined in the corresponding controller)


      for (i = 0; i < joints.length; i++) {
        for (j = 0; j < boneData.length; j++) {
          data = boneData[j];

          if (data.bone.name === joints[i].name) {
            sortedBoneData[i] = data;
            data.processed = true;
            break;
          }
        }
      } // add unprocessed bone data at the end of the list


      for (i = 0; i < boneData.length; i++) {
        data = boneData[i];

        if (data.processed === false) {
          sortedBoneData.push(data);
          data.processed = true;
        }
      } // setup arrays for skeleton creation


      const bones = [];
      const boneInverses = [];

      for (i = 0; i < sortedBoneData.length; i++) {
        data = sortedBoneData[i];
        bones.push(data.bone);
        boneInverses.push(data.boneInverse);
      }

      return new THREE.Skeleton(bones, boneInverses);
    }

    function buildBoneHierarchy(root, joints, boneData) {
      // setup bone data from visual scene
      root.traverse(function (object) {
        if (object.isBone === true) {
          let boneInverse; // retrieve the boneInverse from the controller data

          for (let i = 0; i < joints.length; i++) {
            const joint = joints[i];

            if (joint.name === object.name) {
              boneInverse = joint.boneInverse;
              break;
            }
          }

          if (boneInverse === undefined) {
            // Unfortunately, there can be joints in the visual scene that are not part of the
            // corresponding controller. In this case, we have to create a dummy boneInverse matrix
            // for the respective bone. This bone won't affect any vertices, because there are no skin indices
            // and weights defined for it. But we still have to add the bone to the sorted bone list in order to
            // ensure a correct animation of the model.
            boneInverse = new THREE.Matrix4();
          }

          boneData.push({
            bone: object,
            boneInverse: boneInverse,
            processed: false
          });
        }
      });
    }

    function buildNode(data) {
      const objects = [];
      const matrix = data.matrix;
      const nodes = data.nodes;
      const type = data.type;
      const instanceCameras = data.instanceCameras;
      const instanceControllers = data.instanceControllers;
      const instanceLights = data.instanceLights;
      const instanceGeometries = data.instanceGeometries;
      const instanceNodes = data.instanceNodes; // nodes

      for (let i = 0, l = nodes.length; i < l; i++) {
        objects.push(getNode(nodes[i]));
      } // instance cameras


      for (let i = 0, l = instanceCameras.length; i < l; i++) {
        const instanceCamera = getCamera(instanceCameras[i]);

        if (instanceCamera !== null) {
          objects.push(instanceCamera.clone());
        }
      } // instance controllers


      for (let i = 0, l = instanceControllers.length; i < l; i++) {
        const instance = instanceControllers[i];
        const controller = getController(instance.id);
        const geometries = getGeometry(controller.id);
        const newObjects = buildObjects(geometries, instance.materials);
        const skeletons = instance.skeletons;
        const joints = controller.skin.joints;
        const skeleton = buildSkeleton(skeletons, joints);

        for (let j = 0, jl = newObjects.length; j < jl; j++) {
          const object = newObjects[j];

          if (object.isSkinnedMesh) {
            object.bind(skeleton, controller.skin.bindMatrix);
            object.normalizeSkinWeights();
          }

          objects.push(object);
        }
      } // instance lights


      for (let i = 0, l = instanceLights.length; i < l; i++) {
        const instanceLight = getLight(instanceLights[i]);

        if (instanceLight !== null) {
          objects.push(instanceLight.clone());
        }
      } // instance geometries


      for (let i = 0, l = instanceGeometries.length; i < l; i++) {
        const instance = instanceGeometries[i]; // a single geometry instance in collada can lead to multiple object3Ds.
        // this is the case when primitives are combined like triangles and lines

        const geometries = getGeometry(instance.id);
        const newObjects = buildObjects(geometries, instance.materials);

        for (let j = 0, jl = newObjects.length; j < jl; j++) {
          objects.push(newObjects[j]);
        }
      } // instance nodes


      for (let i = 0, l = instanceNodes.length; i < l; i++) {
        objects.push(getNode(instanceNodes[i]).clone());
      }

      let object;

      if (nodes.length === 0 && objects.length === 1) {
        object = objects[0];
      } else {
        object = type === 'JOINT' ? new THREE.Bone() : new THREE.Group();

        for (let i = 0; i < objects.length; i++) {
          object.add(objects[i]);
        }
      }

      object.name = type === 'JOINT' ? data.sid : data.name;
      object.matrix.copy(matrix);
      object.matrix.decompose(object.position, object.quaternion, object.scale);
      return object;
    }

    const fallbackMaterial = new THREE.MeshBasicMaterial({
      color: 0xff00ff
    });

    function resolveMaterialBinding(keys, instanceMaterials) {
      const materials = [];

      for (let i = 0, l = keys.length; i < l; i++) {
        const id = instanceMaterials[keys[i]];

        if (id === undefined) {
          console.warn('THREE.ColladaLoader: Material with key %s not found. Apply fallback material.', keys[i]);
          materials.push(fallbackMaterial);
        } else {
          materials.push(getMaterial(id));
        }
      }

      return materials;
    }

    function buildObjects(geometries, instanceMaterials) {
      const objects = [];

      for (const type in geometries) {
        const geometry = geometries[type];
        const materials = resolveMaterialBinding(geometry.materialKeys, instanceMaterials); // handle case if no materials are defined

        if (materials.length === 0) {
          if (type === 'lines' || type === 'linestrips') {
            materials.push(new THREE.LineBasicMaterial());
          } else {
            materials.push(new THREE.MeshPhongMaterial());
          }
        } // regard skinning


        const skinning = geometry.data.attributes.skinIndex !== undefined; // choose between a single or multi materials (material array)

        const material = materials.length === 1 ? materials[0] : materials; // now create a specific 3D object

        let object;

        switch (type) {
          case 'lines':
            object = new THREE.LineSegments(geometry.data, material);
            break;

          case 'linestrips':
            object = new THREE.Line(geometry.data, material);
            break;

          case 'triangles':
          case 'polylist':
            if (skinning) {
              object = new THREE.SkinnedMesh(geometry.data, material);
            } else {
              object = new THREE.Mesh(geometry.data, material);
            }

            break;
        }

        objects.push(object);
      }

      return objects;
    }

    function hasNode(id) {
      return library.nodes[id] !== undefined;
    }

    function getNode(id) {
      return getBuild(library.nodes[id], buildNode);
    } // visual scenes


    function parseVisualScene(xml) {
      const data = {
        name: xml.getAttribute('name'),
        children: []
      };
      prepareNodes(xml);
      const elements = getElementsByTagName(xml, 'node');

      for (let i = 0; i < elements.length; i++) {
        data.children.push(parseNode(elements[i]));
      }

      library.visualScenes[xml.getAttribute('id')] = data;
    }

    function buildVisualScene(data) {
      const group = new THREE.Group();
      group.name = data.name;
      const children = data.children;

      for (let i = 0; i < children.length; i++) {
        const child = children[i];
        group.add(getNode(child.id));
      }

      return group;
    }

    function hasVisualScene(id) {
      return library.visualScenes[id] !== undefined;
    }

    function getVisualScene(id) {
      return getBuild(library.visualScenes[id], buildVisualScene);
    } // scenes


    function parseScene(xml) {
      const instance = getElementsByTagName(xml, 'instance_visual_scene')[0];
      return getVisualScene(parseId(instance.getAttribute('url')));
    }

    function setupAnimations() {
      const clips = library.clips;

      if (isEmpty(clips) === true) {
        if (isEmpty(library.animations) === false) {
          // if there are animations but no clips, we create a default clip for playback
          const tracks = [];

          for (const id in library.animations) {
            const animationTracks = getAnimation(id);

            for (let i = 0, l = animationTracks.length; i < l; i++) {
              tracks.push(animationTracks[i]);
            }
          }

          animations.push(new THREE.AnimationClip('default', -1, tracks));
        }
      } else {
        for (const id in clips) {
          animations.push(getAnimationClip(id));
        }
      }
    } // convert the parser error element into text with each child elements text
    // separated by new lines.


    function parserErrorToText(parserError) {
      let result = '';
      const stack = [parserError];

      while (stack.length) {
        const node = stack.shift();

        if (node.nodeType === Node.TEXT_NODE) {
          result += node.textContent;
        } else {
          result += '\n';
          stack.push.apply(stack, node.childNodes);
        }
      }

      return result.trim();
    }

    if (text.length === 0) {
      return {
        scene: new THREE.Scene()
      };
    }

    const xml = new DOMParser().parseFromString(text, 'application/xml');
    const collada = getElementsByTagName(xml, 'COLLADA')[0];
    const parserError = xml.getElementsByTagName('parsererror')[0];

    if (parserError !== undefined) {
      // Chrome will return parser error with a div in it
      const errorElement = getElementsByTagName(parserError, 'div')[0];
      let errorText;

      if (errorElement) {
        errorText = errorElement.textContent;
      } else {
        errorText = parserErrorToText(parserError);
      }

      console.error('THREE.ColladaLoader: Failed to parse collada file.\n', errorText);
      return null;
    } // metadata


    const version = collada.getAttribute('version');
    console.log('THREE.ColladaLoader: File version', version);
    const asset = parseAsset(getElementsByTagName(collada, 'asset')[0]);
    const textureLoader = new THREE.TextureLoader(this.manager);
    textureLoader.setPath(this.resourcePath || path).setCrossOrigin(this.crossOrigin);
    let tgaLoader;

    if (THREE.TGALoader) {
      tgaLoader = new THREE.TGALoader(this.manager);
      tgaLoader.setPath(this.resourcePath || path);
    } //


    const animations = [];
    let kinematics = {};
    let count = 0; //

    const library = {
      animations: {},
      clips: {},
      controllers: {},
      images: {},
      effects: {},
      materials: {},
      cameras: {},
      lights: {},
      geometries: {},
      nodes: {},
      visualScenes: {},
      kinematicsModels: {},
      physicsModels: {},
      kinematicsScenes: {}
    };
    parseLibrary(collada, 'library_animations', 'animation', parseAnimation);
    parseLibrary(collada, 'library_animation_clips', 'animation_clip', parseAnimationClip);
    parseLibrary(collada, 'library_controllers', 'controller', parseController);
    parseLibrary(collada, 'library_images', 'image', parseImage);
    parseLibrary(collada, 'library_effects', 'effect', parseEffect);
    parseLibrary(collada, 'library_materials', 'material', parseMaterial);
    parseLibrary(collada, 'library_cameras', 'camera', parseCamera);
    parseLibrary(collada, 'library_lights', 'light', parseLight);
    parseLibrary(collada, 'library_geometries', 'geometry', parseGeometry);
    parseLibrary(collada, 'library_nodes', 'node', parseNode);
    parseLibrary(collada, 'library_visual_scenes', 'visual_scene', parseVisualScene);
    parseLibrary(collada, 'library_kinematics_models', 'kinematics_model', parseKinematicsModel);
    parseLibrary(collada, 'library_physics_models', 'physics_model', parsePhysicsModel);
    parseLibrary(collada, 'scene', 'instance_kinematics_scene', parseKinematicsScene);
    buildLibrary(library.animations, buildAnimation);
    buildLibrary(library.clips, buildAnimationClip);
    buildLibrary(library.controllers, buildController);
    buildLibrary(library.images, buildImage);
    buildLibrary(library.effects, buildEffect);
    buildLibrary(library.materials, buildMaterial);
    buildLibrary(library.cameras, buildCamera);
    buildLibrary(library.lights, buildLight);
    buildLibrary(library.geometries, buildGeometry);
    buildLibrary(library.visualScenes, buildVisualScene);
    setupAnimations();
    setupKinematics();
    const scene = parseScene(getElementsByTagName(collada, 'scene')[0]);
    scene.animations = animations;

    if (asset.upAxis === 'Z_UP') {
      scene.quaternion.setFromEuler(new THREE.Euler(-Math.PI / 2, 0, 0));
    }

    scene.scale.multiplyScalar(asset.unit);
    return {
      get animations() {
        console.warn('THREE.ColladaLoader: Please access animations over scene.animations now.');
        return animations;
      },

      kinematics: kinematics,
      library: library,
      scene: scene
    };
  }

}

THREE.ColladaLoader = ColladaLoader;
} )();
